JO
John Olsen — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Olsen across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Arthur & John — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Trinkufer |
| Industry | Boston Store |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Trinkufer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1918 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anna Olsen | Head | — | 43 | ~1897 |
| Robert Olsen | Other | — | 31 | ~1909 |
| John Olsen | Son | — | 22 | ~1918 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John Jr |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Son, age 11
Cook, Illinois · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 3 household members
| Surname | Olsen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Trinkufer |
| Industry | Boston Store |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links John Olsen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arthur Olson (~0.92 confidence) and father John Olsen (~0.92 confidence) and mother Anna Olsen (~0.92 confidence) and mother Myrtle Olson (~0.92 confidence) and mother Sylvia Olsen (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur Olson
b. ~1892
Source father
● Household
· direct · ~0.92
Father
John Olsen
b. ~1898
Source father
● Household
· direct · ~0.92
Mother
Anna Olsen
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Myrtle Olson
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Sylvia Olsen
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Olsen
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00989-00087)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emanuel Willan | 27 | Brother | Proprietor | Illinois |
| 2 | Matilda Johnson | 55 | Head | — | Illinois |
| 3 | Marilyn Johnson | 15 | Daughter | — | Illinois |
| 4 | Audrey Johnson | 13 | Daughter | — | Illinois |
| 5 | Frank Johnson | 4 | Son | — | Illinois |
| 6 | George Schuilenberger | 40 | Head | Packer | Austria |
| 7 | Sophie Schuilenberger | 37 | Wife | — | Austria |
| 8 | John Schuilenberger | 26 | Son | Sorter | Illinois |
| 9 | Madeline Schuilenberger | 25 | Daughter | Waitress | Illinois |
| 10 | Robert Roalsen | 10 | Grandson | — | Illinois |
| 11 | Adam Sivick | 45 | Head | — | Lithuania |
| 12 | Normand Duran | 31 | Head | Auto Mechanic | Illinois |
| 13 | Myrtle Duran | 25 | Wife | — | Illinois |
| 14 | Howard Duran | 8 | Son | — | Illinois |
| 15 | Dennis Duran | 2 | Son | — | Illinois |
| 16 | Desire De Wolf | 53 | Head | Tailor | Belgium |
| 17 | Angeline De Wolf | 49 | Wife | — | Belgium |
| 18 | Marcella De Wolf | 25 | Daughter | — | Illinois |
| 19 | Pearl Thompson | 51 | Head | — | Illinois |
| 20 | J. Ernest Thompson | 21 | Son | Paper Maker | Illinois |
| 21 | John Reeves | 59 | Roomer | Porter | Missouri |
| 22 | Anna Olsen | 43 | Head | — | Poland |
| 23 | John Olsen THIS PERSON | 22 | Son | Trinkufer | Illinois |
| 24 | Robert Olsen | 31 | Nephew | Iron Grinder | Norway |
| 25 | Anthony Marchi | 53 | Head | Furrier | Italy |
| 26 | Valentina Marchi | 41 | Wife | — | Italy |
| 27 | Leopold Marchi | 13 | Son | — | Italy |
| 28 | William Potratz | 23 | Head | — | Illinois |
| 29 | Velma Potratz | 24 | Wife | — | Illinois |
| 30 | Marilyn Potratz | 2 | Daughter | — | Illinois |
| 31 | Beverly Potratz | 1 | Daughter | — | Illinois |
| 32 | Howard Heimbrodt | 23 | Head | Pottery Maker | Illinois |
| 33 | Florence Heimbrodt | 23 | Wife | — | Illinois |
| 34 | Patricia Heimbrodt | 2 | Daughter | — | Illinois |
| 35 | Geraldine Heimbrodt | 20 | Sister | Garter Maker | Illinois |
| 36 | William Gorham | 66 | Head | Janitor | Illinois |
| 37 | Lillian Gorham | 46 | Wife | — | Mass. |
| 38 | John Marty | 67 | Head | — | Italy |
| 39 | Rosinta Marty | 66 | Wife | — | Italy |
| 40 | Marty Marty | 38 | Son | Truck Driver | Italy |
Related Census Records
Pedigree Summary
John
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)